Whisker resistant tin coatings and baths and methods for making such coatings

  • US 4,749,626 A
  • Filed: 07/03/1986
  • Issued: 06/07/1988
  • Est. Priority Date: 08/05/1985
  • Status: Expired due to Fees
First Claim
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1. A method for inhibiting tin whisker growth on a substrate material having a tin containing coating, said method comprising:

  • preparing a tin coating solution containing a metal salt selected from the group consisting of palladium salts, silver salts, nickel salts, iron salts, cadmium salts, platinum salts, gold salts, indium salts, ruthenium salts, and cobalt salts; and

    said preparing step comprising providing an initial tin containing solution and adding said metal salt to said initial solution in a concentration above the saturation point of the initial solution to form a metal salt saturated solution; and

    applying said tin coating solution to said substrate material.

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